DOMAttr::isId

(PHP 5)

DOMAttr::isId —
Checks if attribute is a defined ID

Beschreibung

publicboolDOMAttr::isId
( void
)

This function checks if the attribute is a defined ID.

According to the DOM standard this requires a DTD which defines the
attribute ID to be of type ID. You need to validate your document with
DOMDocument::validate
or DOMDocument::validateOnParse before using this function.

Rückgabewerte

Gibt bei Erfolg TRUE zurück. Im Fehlerfall wird FALSE zurückgegeben.

Beispiele

Beispiel #1 DOMAttr::isId() Example

<?php

$doc = new DomDocument;

// We need to validate our document before refering to the id$doc->validateOnParse = true;$doc->Load('book.xml');

// We retrieve the attribute named id of the chapter element$attr = $doc->getElementsByTagName('chapter')->item(0)->getAttributeNode('id');